Transmission-pole.



R. L. LUSK & F. S. MARBURY. TRANSMISSION POLE. APPLICATION FILED MAY 27,1914.

' Patented Dec. 1, 1914.

2 SHEETS-SHEET 1.

zmmn iwwW WITNESSES I115 Nah-R15 PETERS 60.. FHoTn-LITHa, WASHING TON,D. c.

R. L. LUSK & F. S. MARBURY. TRANSMISSION POLE. APPLICATION FILED MAY 27,1914,

1,119,521, Patented Dec.1,1914.

2 SHEETS-SHEET 2.

W/ TNESSES THE NORRIS PETERS CO PHOTU-LITHOH WASHINGTUN. D. C.

UNITED STATES PATENT OFFICE.

ROSS L. LUsK AND rnancrs s. MARBUILY, on NEW YORK, N. Y.

TRANSMISSIODLPOLE'.

Specification of Letters Patent.

Patented Dec. 1,1914.

Applicationfiled May 27, 1914. Serial No. 841,195.

To all whom it may concern Be it known that we, Ross L. FRAN crs S.MARBURY, citizens of the United States, residing at the borough of.Manhat: tan,-city, county, and State of New York, have invented anImprovement in Transmission-Poles, of which the following isa spec1-fication.

Our present invention relates to poles for 'angles have been used asuprights, it. has

been customary to employ these uprights in pairs, or multiple pairs, sothat straight line cross straps might be used. l/Ve are also aware thatpoles of this description havebeen constructed with three uprights, butin this class of poles, either a special angle iron has been employed,in order to use straight line cross straps, orround or channel ironshave been employed, together with suitable spacers placed and extendingbetween the same and adjacent straps extending around the same andconnected thereto or to the spacers or to both.

Now the object of our present invention is the provision of atransmission pole, constructed with three regular stock 90 angle ironsas uprights, together with suitable cross straps, the ends of which areconnected to and lie parallel with the faces of the uprights, while theintervening portions of the straps, that is to say, those portionsextending between the uprights, curve so that the uprights may assumetheir proper equi-distant relationship in the completed structure.

As is customary in this class of transmission poles. the uprightspreferably converge from the base toward the top or a point adjacentthereto. At the lower end of the pole. constructed in accordance withour invention. the same may be made to receive cross timbers, in orderto form an anchorage to assist in supporting the pole when placed in theground, and preferably at the upper end of the pole. and for apredetermined dis tance, the upright members are parallel to oneanother, to provide a cross arm section LUsK. and

of the pole, to which, in a suitable manner, one or morecross arms maybe secured.

In the drawing, Figure 11s an elevation of the lower portion of the poleconstructed in accordance with our invention, showing the base thereofset in the ground. Fig. 2 is an elevation of the upper portion ofthepole. Fig. 8 is a plan of one of the cross arms. Fig. 4. is an enlargedcross section on line 4, 4, Fig. 1. Fig. 5 is a plan, and cross section.Fig. 5 is a similar View, showing the manner in which each cross arm isconnected tov the pole, and Fig. 6 is a cross sec tion on lines 6,.6,Fig. 2, Figs. 5, 5 and" 6 being on an enlarged scale.

Referring to the drawing, it will be seen that in constructing atransmission pole made in accordance with our invention, we employ threeregular stock 90 angle irons which are indicated at 10, 11 and 12. Theseangle irons, as is customary, when the pole is completed, preferablyconverge from the base to a point at a predetermined distance therefrom.c i

The angle iron uprights are connected by suitable straps and bolts orrivets, the distant faces of adjacent uprights being thusv connected bythese straps. The straps connecting the distant faces of the poles 10and 11 are indicated at 13. The straps connecting the distant faces ofthe apparatus 10 and 12 are indicated at 14c, and similarly the strapsconnecting the distant faces of the uprights 11 and 12 are indicated at15. These straps, as will also appear, from Figs. 1 and 2 of thedrawing, extend in a zig-zag path from the lower end of the pole to apoint a predetermined distance above the ground.

In the construction of the pole, the adjacent" ends of each set ofstraps are connected by rivets, bolts or otherwise, to the members ofthe uprights, as hereinbefore described, and the uprights brought intoan equi-distant relationship before the last joints between the same.and the straps are made, so that in so doing, the straps are bent orcurved between the respective uprights, the- By reference to Fig. 1, itwill be seen that we may make provision for the use of timbers,indicated at 18 and 19, when the pole is set in the ground, by placingpredetermined cross straps at right angles, or substantially rightangles to the uprights, one set of such straps being indicated at 16 and17 in Fig. 1.

At the base of the pole, the lower ends of the uprights are preferablyprovided with brackets 21, suitably secured thereto, and connectingstraps :22, extending between and secured to the brackets, so that thelower ends of the uprights are securely connected together. At the lowerend of the pole, we may also make provision for the use of timbcrsQZland 21, by means of placing the straps at right angles to the uprights,these timbers and ill, as Well as the timbers 18 and 19, acting asanchors to assist in supporting the pole when the same is placed in theground, indicated at 20.

As hereinbefore stated, the upright members of the pole converge fromthe base for a predetermined distance, above which, in accordance withour invention, the uprights preferably extend parallel to each other, asindicated at 26, in Fig. :3, in order to provide a cross arm section forthe pole. The uprights in this cross arm section may be connected by theuse of suitable U-shapcd straps 27, as indicated in Fi 6, by referenceto which it will be seen that the straps at their ends are suitablyriveted to the upright members of the pole. Ne also employ one or morecross arms, as indicated at Fig. 2, and each of these, as indicated inthis figure and in F 3, comprises a pair of channel irons 28 and 29,extending parallel to each other a predetermined distance in theircentral portions, and converging at either side thereof to the ends ofthe cross arm. In each cross arm the channel irons thereof are connectedby strap members 30 by being riveted or bolted, or otherwise securedthereto, thereby uniting the channel irons and formingthe cross arm. Ineach Regina 01 this patent may be obtained for of the strap members 30,there is provided a hole or aperture 31, adapted to receive a pin uponwhich an insulator is placed for connecting the t"1I1S111lSSl011 wiresor other devices thereto. As is also indicated in Figs. 3, 5 and 5, themember 28 of each cross arm is provided with brackets 32 adapted toreceive between the same and the adjacent portion of the channel ironone of the upright members of the arm section of the pole, to which thesame is suitably riveted, and the corresponding portion of each member29, on its inner face, is also provided with brackets 33 and 3-1, towhich the opposite or other upright members of the pole are secured bysuitable rivets or otherwise, it being understood that as clearly shownin Figs. 5 and 5, the parts of the brackets 32 are made at obtuse anglesto one another, whereas the parts of the brackets 33 and 31 are made atacute angles to each other, in order to properly it over the parallelupright members of the pole. As will also ap pear from Fig. 2, theupright members at their upper extremities may be caused to so taper asto meet each other, and adjacent the meeting points may be suitablyconnected.

We claim as our invention:

1. A transmission pole comprising three equi-spaced 90 angle uprights,series of bowed cross straps, and means for connecting the ends of thecross straps to the faces of the uprights.

2. A transmission pole comprising three 90 angle upri hts, a series ofcross straps extending between and so connected to the said uprightsthat at theyends the said stra" :5 lie parallel to the faces of theuprights, while the intervening portions of the straps are bowed.

Signed by us this 25th day of May, 1914-.

ROSS L. LUSK. FRANCIS S. MARBURY.

Witnesses M. V. Foauns'r, A. M. GRANGER.

five cents each. by addressing the Commissioner of Patents,

Washington, D. C.

